i recently purchased excel saga aswell, i'd have to say its funny and entertaining, but its not an anime that you will go out of your way to watch. what i mean is, its not like there's some crazy compelling story, or there's a twist in the plot at the end and you can't wait to see the next episode, its more like, "hey if i got the time i'll give it a watch" its more for casual viewing and it will probly take me a while to finish this as i won't be watching it on a daily basis, but it is entertaining regardless. its also very insane, i'd put it up there with FLCL as far as randomness goes, things happen and you will just be like "wtf?"
I laughed pretty hard on ep 4 when they did the dating game sim and the options were always like
a)Stalk her
b)kill her
c)put it in ^_^
Space Butler, Pedro, those little martians that turn into angry men when you hit them and the Afro guy named Nabeshin who looks like Spike from Bebop also cracked me up